摘要
为减小边坡监测雷达系统中巨大的数据运算和传送压力,并充分利用Xilinx Kintex-7FPGA内部富余的硬件资源,设计了针对调频连续波的地基合成孔径雷达回波数据的快速预处理系统。该系统利用FPGA的并行处理能力与流水线结构,结合Xilinx ISE14.7开发平台中RAM/ROM、Divider、FFT IP核,实现了任意数量PRT信号相干积累、汉宁窗加窗滤波以及距离向压缩三项功能。经该系统处理后,在雷达回波数据到达DSP之前,雷达回波信号的信噪比得到了显著提高,距离向旁瓣得到了有效抑制,同时雷达系统的实时处理能力得到了极大的提升。
To reduce the huge data-operation and transmission pressure in slope monitoring radar system and make full use of the hardware resources in the Xilinx Kintex-7 field-programmable gate array (FPGA), a rapid echo data preprocessing system is designed for frequency-modulated continuous-wave (FMCW) ground-based synthetic aperture radar (GB-SAR). Thanks to the parallel processing capability and pipeline structure of FPGA, this system achieves any amount of coherent accumulation, Hanning filtering and pulse compression in the range dimension with the RAM/ROM, divider and FFT IP core in Xilinx ISE14.7 development platform. After preprocessing, the SNR of SAR echo signal is significantly improved before the data arrives at the digital signal processor(DSP), and the sidelobe of the distance compression result is effectively suppressed. Meanwhile, the real-time processing capability of the radar system has been greatly improved.
作者
蒲鹤升
谭泽富
谭瑷军
燕曼君
PU Hesheng;TAN Zefu;TAN Yuanjun;YAN Manjun(Chongqing Three Gorges University, Chongqing 404000, China)
出处
《雷达科学与技术》
北大核心
2019年第2期213-219,共7页
Radar Science and Technology
关键词
调频连续波
地基合成孔径雷达
解线调频
现场可编程门阵列
实时处理
frequency-modulated continuous-wave(FMCW)
ground-based synthetic aperture radar( GB-SAR)
dechirping
field-programmable gate array(FPGA)
real-time processing
